Mark Malloch Brown, Baron Malloch-Brown, English journalist and politician, 2nd Deputy Secretary-General of the United Nations
George Mark Malloch Brown, Baron Malloch-Brown (born 16 September 1953) is a British diplomat, communications consultant, journalist and former politician who has served as president of Open Society Foundations since 2021. A former member of the Labour Party, he was Minister of State for Africa and the United Nations from 2007 to 2009.

Born in Marylebone, Malloch Brown studied at Magdalene College, Cambridge and the University of Michigan. He was political correspondent for The Economist between 1977 and 1979 and then worked for the office of the United Nations High Commissioner for Refugees from 1979 to 1983. After acting as lead international partner at American public relations firm Sawyer-Miller, he was development specialist at the World Bank from 1994 to 1999, administrator of the United Nations Development Programme from 1999 to 2005 and United Nations Deputy Secretary-General from April to December 2006.

Malloch Brown joined the government of Gordon Brown in 2007 at the Foreign and Commonwealth Office and was elevated to the House of Lords as a life peer. After stepping down from the government in 2009 due to family and personal reasons, he was appointed chairman of global affairs for FTI Consulting a year later. In 2014, he was appointed chairman of the board of directors of election technology manufacturer Smartmatic's holding company. In December 2020, he was chosen to serve as president of Open Society Foundations starting in January 2021.